Question

15. Три или четыре из следующих функций осуществляются лейкоцитами (белыми клетками крови). Какая из них, если вообще такая есть, не является функцией лейкоцитов? А) Очистка от мертвых клеток B) Синтез антител C) Поглощение бактерий D) Поглощение вирусов E) Все вышеперечисленное осуществляется лейкоцитами СРОЧНО!!! ПЛИИИИЗ!!!

Answer 1

Ответ: Е)

Объяснение: Лейкоциты - защищают организм от различных чужеродных микроорганизмов. Некоторые лейкоциты обладают проникать через стенки кровеносных сосудов в ткани, поглощать посторонние частицы ( бактерий и вирусов ) и переваривать их. Это явление называется фагоцитозом, а пожирающие клетки - фагоцитами.

Наряду с фагоцитозом у организма есть и другие средства защиты - антитела. Они имеют белковую природу и продуцируются лейкоцитами. Они растворяют посторонние частицы, попавшие в организм.

Answer 2

Functions of Leukocytes (White Blood Cells)

Leukocytes, or white blood cells, play a crucial role in the immune system and perform various functions to protect the body against pathogens and foreign substances. Let's examine the functions of leukocytes and determine which one, if any, is not performed by these cells.

1. Clearance of dead cells: Leukocytes are involved in the clearance of dead cells and cellular debris from the body. This function helps maintain tissue homeostasis and prevent the accumulation of waste material. (A)

2. Synthesis of antibodies: Antibodies, also known as immunoglobulins, are proteins produced by certain types of leukocytes called B cells. Antibodies play a key role in the immune response by recognizing and neutralizing specific antigens, such as bacteria, viruses, and other foreign substances. (B)

3. Phagocytosis of bacteria: Phagocytosis is the process by which leukocytes engulf and destroy bacteria and other microorganisms. This function is performed by specific types of leukocytes, such as neutrophils and macrophages, which are capable of recognizing and ingesting bacteria. (C)

4. Phagocytosis of viruses: While leukocytes are involved in the immune response against viral infections, they do not directly phagocytose viruses. Instead, leukocytes, particularly lymphocytes, play a role in recognizing viral antigens and coordinating the immune response against viral infections. (D)

Based on the functions described above, it can be concluded that phagocytosis of viruses (D) is not a function performed by leukocytes. Leukocytes primarily play a role in clearing dead cells, synthesizing antibodies, and phagocytosing bacteria.

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